Fall in zone 6bPhoto: Dietmar Rabich, CC BY-SA 4.0, via Wikimedia Commons
Frost dates for ZIP 73942 (Guymon, OK)
Average last spring and first fall frost dates with 10%, 50% and 90% odds, from NOAA's 1991–2020 climate normals for the nearest weather station, Guymon Muni AP, OK (4 miles away).
- Average last spring frostApr 1850% chance of a 32°F freeze after this date
- Average first fall frostOct 2350% chance of a 32°F freeze by this date
- Growing season (frost-free)188 daysmedian, 32°F threshold
- USDA hardiness zone6b-5 to 0°F avg. coldest night
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This week in your yard
As of Oct 18, 2026, from your frost dates, zone and soil temperature. Lawn timing · Vegetables · Pruning · Plants
Soil temperature now
2-inch depth
55°F 55°F or warmer
24-hour average · latest 55°F, as of Oct 18, 1:00 AM CDT
Measured at NOAA USCRN station Goodwell 2 E, 11 mi away. Daily averages: Thu 62°, Fri 57°, Sat 55°.
4-inch depth
56°F 55°F or warmer
24-hour average · latest 57°F, as of Oct 18, 1:00 AM CDT
Measured at NOAA USCRN station Goodwell 2 E, 11 mi away. Daily averages: Thu 63°, Fri 58°, Sat 56°.
Fall: Texas A&M AgriLife times fall pre-emergent (for winter weeds such as annual bluegrass) to soil cooling to about 70°F for several days. The 50–55°F band is the spring trigger. Always read and follow the product label.
7-day forecast and frost risk
The latest National Weather Service 7-day forecast and any Frost Advisory or Freeze Warning for 73942 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
Soil is 56°F at 4 inches. Fall pre-emergent (annual bluegrass, winter weeds): window open as soil cools through the 70s and 60s.
Fertilizer window
Lawn region: South Central plains. Timing only; always follow the product label.
- Bermudagrass (warm-season): Spring: Several weeks after the lawn is fully green (April–May) (about Jun 3 here, using green-up about 3–4 weeks after your average last frost); Summer: Every 4–6 weeks through mid-August (heaviest feeder of the group); Late: Light, low-nitrogen/high-potassium feeding about 4 weeks before first frost, or skip. Avoid: Heavy late-fall nitrogen (linked to spring dead spot).
- Tall fescue (cool-season): Early fall: September (main feeding); Late fall: November, while still green; Late winter: Optional light feeding February–March. Avoid: Feeding after mid-spring and through summer in the transition zone (stress and brown patch).
Plant now
No vegetable planting windows are open this week.
Prune now
No frost-timed pruning windows are open this week.
Your average first frost is Oct 23: skip heavy pruning in the 6–8 weeks before it, because new growth may not harden off in time.
Spring-flowering shrubs are pruned right after their flowers fade, not by date. See the pruning guide.
Last spring frost odds
| Chance of a 32°F freeze after this date | Date |
|---|---|
| 90% (early: most years still freeze after this) | Apr 4 |
| 50% (the "average" last frost) | Apr 18 |
| 10% (cautious: only 1 year in 10 freezes later) | May 1 |
Most gardeners plant frost-tender crops (tomatoes, peppers, basil) after the 50% date, and closer to the 10% date for less risk.
First fall frost odds
| Chance the first 32°F freeze has happened by this date | Date |
|---|---|
| 10% (early: 1 year in 10 freezes this soon) | Oct 11 |
| 50% (the "average" first frost) | Oct 23 |
| 90% (late: most years have frozen by now) | Nov 3 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Apr 28 | Oct 14 |
| 32°F (freeze) | Apr 18 | Oct 23 |
| 28°F (hard freeze) | Apr 8 | Nov 1 |
n/a means NOAA did not publish a date at that threshold for this station (usually because it rarely gets that cold).
Vegetable planting calendar for 73942
Dates count from your average last spring frost (Apr 18) and first fall frost (Oct 23). Half of years have a frost after the spring date, so give tender crops (tomatoes, peppers, squash) some slack.
| Crop | Start indoors | Spring planting | Fall planting |
|---|---|---|---|
| Tomato | Feb 21–Mar 7 | Apr 25–May 9 (transplant) | – |
| Pepper (sweet and hot) | Feb 7–21 | May 2–16 (transplant) | – |
| Eggplant | Feb 7–21 | May 2–16 (transplant) | – |
| Tomatillo | Feb 21–Mar 7 | Apr 25–May 9 (transplant) | – |
| Lettuce | Feb 21–Mar 7 | Mar 28–Apr 18 (transplant) Mar 21–May 2 (sow outdoors) | Aug 28–Sep 18 (transplant) Aug 14–Sep 11 (sowing) |
| Spinach | – | Mar 7–28 (sow outdoors) | Aug 28–Sep 18 (sowing) |
| Kale | Feb 21–Mar 7 | Mar 21–Apr 4 (transplant) Mar 21–Apr 4 (sow outdoors) | Jul 31–Aug 28 (transplant) Jul 17–Aug 14 (sowing) |
| Collards | Feb 21–Mar 7 | Mar 21–Apr 18 (transplant) Mar 21–Apr 18 (sow outdoors) | Jul 31–Aug 28 (transplant) Jul 17–Aug 14 (sowing) |
| Broccoli | Feb 7–21 | Mar 21–Apr 4 (transplant) | Jul 17–Aug 14 (transplant) |
| Cabbage | Feb 7–21 | Mar 21–Apr 4 (transplant) | Jul 17–Aug 14 (transplant) |
| Cauliflower | Feb 7–21 | Apr 4–18 (transplant) | Jul 17–Aug 14 (transplant) |
| Brussels sprouts | Jan 24–Feb 7 | Mar 21–Apr 4 (transplant) | Jul 3–24 (transplant) |
| Kohlrabi | Feb 21–Mar 7 | Mar 21–Apr 4 (transplant) Mar 21–Apr 4 (sow outdoors) | Aug 14–28 (sowing) |
| Bok choy / Asian greens | – | Mar 21–Apr 4 (sow outdoors) | Aug 28–Sep 11 (sowing) |
| Arugula | – | Mar 21–Apr 18 (sow outdoors) | Aug 28–Sep 25 (sowing) |
| Mustard greens | – | Mar 21–Apr 11 (sow outdoors) | Aug 28–Sep 11 (sowing) |
| Swiss chard | Mar 7–21 | Apr 4–25 (transplant) Apr 4–May 2 (sow outdoors) | Aug 14–28 (sowing) |
| Beet | – | Mar 21–Apr 18 (sow outdoors) | Aug 14–28 (sowing) |
| Carrot | – | Mar 28–Apr 25 (sow outdoors) | Jul 31–Aug 14 (sowing) |
| Radish | – | Mar 14–Apr 25 (sow outdoors) | Sep 11–25 (sowing) |
| Turnip | – | Mar 21–Apr 11 (sow outdoors) | Aug 14–28 (sowing) |
| Parsnip | – | Mar 28–Apr 18 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Feb 21–Mar 21 (sow outdoors) | Jul 31–Aug 14 (sowing) |
| Onion (bulbing) | Jan 24–Feb 7 | Mar 7–21 (transplant) | – |
| Green onion / scallion | – | Mar 7–Apr 4 (sow outdoors) | Aug 14–28 (sowing) |
| Leek | Jan 24–Feb 7 | Mar 21–Apr 4 (transplant) | – |
| Garlic | – | – | Sep 11–Oct 9 (sowing) |
| Shallot | – | Mar 7–21 (transplant) | Sep 11–Oct 9 (sowing) |
| Potato | – | Mar 21–Apr 4 (transplant) | Jul 3–17 (transplant) |
| Sweet potato | – | May 9–23 (transplant) | – |
| Sweet corn | – | Apr 25–May 9 (sow outdoors) | – |
| Bean, bush (snap) | – | Apr 25–May 9 (sow outdoors) | – |
| Bean, pole | – | Apr 25–May 9 (sow outdoors) | – |
| Lima bean | – | May 2–16 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | May 9–30 (sow outdoors) | – |
| Cucumber | Mar 21–28 | Apr 25–May 9 (transplant) Apr 25–May 9 (sow outdoors) | – |
| Summer squash / zucchini | Mar 21–28 | Apr 25–May 9 (transplant) Apr 25–May 9 (sow outdoors) | – |
| Winter squash | Mar 21–28 | Apr 25–May 9 (transplant) Apr 25–May 9 (sow outdoors) | – |
| Pumpkin | – | Apr 25–May 9 (sow outdoors) | – |
| Watermelon | Mar 21–28 | May 2–16 (transplant) May 2–16 (sow outdoors) | – |
| Cantaloupe / muskmelon | Mar 21–28 | May 2–16 (transplant) May 2–16 (sow outdoors) | – |
| Okra | Mar 7–21 | May 2–16 (transplant) May 2–16 (sow outdoors) | – |
| Celery | Jan 24–Feb 7 | Apr 25–May 2 (transplant) | – |
| Basil | Mar 7–21 | Apr 25–May 9 (transplant) Apr 25–May 9 (sow outdoors) | – |
| Cilantro | – | Apr 4–May 2 (sow outdoors) | Aug 28–Sep 11 (sowing) |
| Parsley | Feb 7–21 | Apr 4–18 (transplant) Mar 28–Apr 18 (sow outdoors) | – |
| Dill | – | Apr 18–May 2 (sow outdoors) | Aug 28–Sep 11 (sowing) |
| Sunflower | – | Apr 18–May 2 (sow outdoors) | – |
| Asparagus (crowns) | – | Mar 21–Apr 4 (transplant) | – |
| Rhubarb (crowns) | – | Mar 21–Apr 4 (transplant) | – |
| Strawberry (plants) | – | Mar 21–Apr 4 (transplant) | Aug 14–Sep 11 (transplant) |
Typical ranges from university extension planting calendars, adjusted to your frost dates. Probabilities, not guarantees. Fall windows that would overlap spring planting are left out, as are fall crops of frost-tender plants where the frost-free season is under 210 days.
Plants that do well here
Oklahoma has a university or garden plant program: Oklahoma Proven. Plant frost-tender annuals after April 18 here (the average last frost). Not affiliated with the program.
Where these numbers come from
Station: Guymon Muni AP, OK (NOAA GHCN-Daily ID USW00003030), elevation 3,123 ft, 4.3 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Goodwell 2 E, OK | 11 mi | Apr 22 | Oct 22 |
| Goodwell Rsch STN, OK | 12 mi | Apr 24 | Oct 19 |
| Goodwell 2 SE, OK | 14 mi | Apr 18 | Oct 24 |
The average last-frost dates of these stations span 6 days, a rough guide to local variation. See data sources & methods.
Frost questions for 73942
When is the last frost in 73942?
The average (50% chance) last spring freeze of 32°F for ZIP 73942 is April 18. For a more cautious planting date, use May 1, when only 1 year in 10 still sees a later freeze.
When is the first frost in 73942?
The average first fall freeze is October 23. In 1 year in 10 it comes by October 11.
What hardiness zone is 73942?
ZIP 73942 is in USDA zone 6b (-5 to 0°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 73942 right now?
This page shows the latest 2-inch and 4-inch soil temperature from the nearest public soil station (USDA SCAN, NOAA USCRN or TexMesonet), or a labeled estimate when no station is close, against the 50–55°F spring pre-emergent band.
Nearby ZIP codes
73945 Hooker 73939 Goodwell 73901 Adams 73960 Texhoma 73944 Hardesty 73951 Tyrone 73949 Texhoma 67950 Elkhart
Other ZIP codes in Texas County
73901 73939 73944 73945 73949 73951 All Texas County frost dates · Oklahoma frost dates
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